DSLR can be mainly divided into two models: full frame and APS-C. Of course, if you are captious, there are also APS-H and 4/3, but they are not the main stream. The most obvious difference between them is the sensor inside, which has the same function as traditional negative film that determine the size and quality of photos. Due to the reason of high price of the sensor, some DSRLs (we call APS-C) cut about 1/3 in size. Full frame totally has the same size as the traditional photo.
Does it matter? In fact, it cut 33% bokeh, which is the single eye feature that many people love. You can directly think that full frame is better than APS-C as it has more photography options and quality. Or you can say that when the users don’t like the bokeh, full frame is not necessary. It is just like there is a seafood banquet but you allergy. When the light in the house is not sufficient, or that needs bokeh in wedding photography, full frame is my first choice. The performance of image and depth of field are irreplaceable.
Then what is the advantage of APS-C. To myself, I use it frequently at outdoor or travel as it is lightweight. There are a lot long zoom lenses, which is very wonderful in wildlife photography. Due to the feature of lens, the edge of the image is related worse than the centre in image. Now APS-C cut the put. The conclusion is turn out: though they have different as the reason of cost, there are no absolutely advantage and disadvantages.
Good or bad of a camera is mostly determined by the users. Of course, the cameras have different emphasis. Take Canon as example, they divide the products into three levels. The ones have three numbers (500D/550D/600D) is normal in quality and function; two numbers (40D/50D/60D) have normal quality but good functions; single number ones have good quality and normal functions; 1 series is the best (1D/1Ds). The boundary is faint and there are special models. In the price part, the last series 1D can be 10 times to 500D.
Many people recommend green hands to buy the best camera at first, which is not my point, because not everyone need or handle the functions of top models. I can see a many people carry more expensive camera than I but very poor in photography. It is a pity. Of course, if you are rich and don’t care about money, the best one will be OK. But to most of the beginners, you should care more about the budget as the cost of photography is the number in your mind. Beside camera and lens, below list of equipments may remind you this point: tripod, camera bags, filter, flash, stabilizer, background, and so on. Every part needs money.
Now, I’d like to recommend several models. For low budget friends, my suggestion is Canon EOS 550D or Sony NEX-5N. The reason I don’t recommend Nikon is that I don’t use it frequently, but I have a good impression to the D7000.
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